labium

Etymology

Learned borrowing from Latin labium (“a lip”). Doublet of lip.

noun

  1. (anatomy, usually in the plural) A liplike structure; especially one of the two pairs of folds of skin on either side of the vulva.
  2. (botany) The lip of a labiate corolla.
  3. (entomology) A lower mouthpart of an insect that is formed by the second pair of maxillae united in the middle line.
    1. (zoology) A liplike part of various invertebrates.
  4. (music) The lip against which pressured air is driven to produce sound in a recorder and in a pipe organ with flue pipes.

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